Final answer:
Walmart's use of technology to integrate supplier data exemplifies supply chain management, promoting economies of scale and more efficient manufacturing processes. The correct answer is option A).
Step-by-step explanation:
Walmart's collaboration with its suppliers, using tools such as electronic billing, purchase order verification, and bar code technology to integrate data and improve performance is an example of supply chain management. This approach helps streamline the manufacturing process and minimize costs, as part of the broader trends of globalization and technological advancement. The integration of various steps in the supply network leads to economies of scale, where the quantity of output can increase while the cost per unit decreases.